Science Projects for Kids: Producing Sounds

Bottle music is a science project for kids on producing sound that explores how volume and liquid affect sound waves. After experimenting with different types of bottles and levels of water, show your friends how this project works and start a bottle music band!

What You'll Need:

Eight empty bottles

Water

Step 1: Stand eight empty bottles side by side on a table in front of you. Fill the bottle on the left about 1/4 of the way full with water.

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Step 2: Add water to the next bottle so that the water level is a bit higher than in the first bottle. Continue adding water to the bottles so that each one has a little bit more water in it than the bottle to its left.

Step 3: Blow across the bottle on the left, and you'll hear a low note. Blow across the bottle on the right, and you'll hear a high note. By adjusting the amount of water in each bottle, you can produce a whole musical scale.

When you blow across the bottle, you cause the air inside to vibrate, which produces a sound. The amount of air in the bottle affects the sound it makes. The bottles with more air produce low sounds, and the bottles with less air produce high sounds.